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Phantasy [73]
4 years ago
8

What is the system of solution to y-x=-13 and -4x+3y=-51

Mathematics
1 answer:
poizon [28]4 years ago
8 0
Equation 1 ==> y - x = -13
Equation 2 ==> -4x + 3y = -51
3(y - x) = 3(-13)
Equation 3 ==> 3y - 3x = -39

Equation 2 - 3
= (3y - 3y) + ( -4x - (-3x) ) = -51 - (-39)
-x = -12
x = 12

Substitude x into equation 1
y - 12 = -13
y = -1
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Please help me I’m just learning this
rosijanka [135]

Answer:

64 cm^2

Step-by-step explanation:

Area of Shaded Region = Area of Parallelogram - Area of Rectangle

Area of Parallelogram = 10 * 7 = 70

Area of Rectangle = 2 * 3 = 6

70 - 6 = 64 cm^2

6 0
3 years ago
What is the derivative of y with respect to x if y = 2/X4
zepelin [54]
You're correct, the answer is C.

Given any function of the form y=x^n, then the derivative of y with respect to x (\frac{dy}{dx}) is written as:
\frac{dy}{dx}=nx^n^-^1

In which n is any constant, this is called the power rule for differentiation.

For this example we have y= \frac{2}{x^4}, first lets get rid of the quotient and write the expression in the form y=x^n:
y= \frac{2}{x^4} =2x^-^4

Now we can directly apply the rule stated at the beginning (in which n=-4):
\frac{dy}{dx}=(2)(-4)x^{-4-1}=-8 x^{-5}= -\frac{8}{x^5}

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6 0
3 years ago
Please help will give brainlist if its correct
Ugo [173]

Answer:

I think it's B

Step-by-step explanation:

x = -2

2 + x > -8

2 + -2 > -8

0 > -8

4 0
3 years ago
Read 2 more answers
After awarding its money this year, the program received a gift of $1,275. The program leader decided to award this money to an
nika2105 [10]

Answer:

pls like and make me brainliest :)

Step-by-step explanation:

1275 divided by 15=$85 each

3 0
2 years ago
PLEASE HELP ASAP IM REALLY TRING TO FINISH A stick has a length of $5$ units. The stick is then broken at two points, chosen at
Fed [463]

Answer:

0.16

Step-by-step explanation:

  • Length = 5 units
  • Number of broken sticks= 3
  • Equal lengths =  5 units/3

<u>See the picture attached for reference.</u>

As you see the best points are the green areas which covers 2 out of 5 zones.

<u>Since it is same for both broken points, the probability of  this is:</u>

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<u>Answer is</u> 0.16

8 0
3 years ago
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